/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.l2j.gameserver.skills;

import java.io.File;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;

import javolution.util.FastList;
import net.sf.l2j.Config;
import net.sf.l2j.gameserver.datatables.SkillTable;
import net.sf.l2j.gameserver.model.L2Skill;
import net.sf.l2j.gameserver.model.item.Item;
import net.sf.l2j.gameserver.templates.L2Armor;
import net.sf.l2j.gameserver.templates.L2EtcItem;
import net.sf.l2j.gameserver.templates.L2EtcItemType;
import net.sf.l2j.gameserver.templates.L2Item;
import net.sf.l2j.gameserver.templates.L2Weapon;

/**
 * @author mkizub TODO To change the template for this generated type comment go
 *         to Window - Preferences - Java - Code Style - Code Templates
 */
public class SkillsEngine {
	protected static final Logger _log = Logger.getLogger(SkillsEngine.class
			.getName());
	private static final SkillsEngine _instance = new SkillsEngine();
	private List<File> _armorFiles = new FastList<File>();
	private List<File> _weaponFiles = new FastList<File>();
	private List<File> _etcitemFiles = new FastList<File>();
	private List<File> _skillFiles = new FastList<File>();

	public static SkillsEngine getInstance() {
		return _instance;
	}

	private SkillsEngine() {
		// hashFiles("data/stats/etcitem", _etcitemFiles);
		hashFiles("data/stats/armor", _armorFiles);
		hashFiles("data/stats/weapon", _weaponFiles);
		hashFiles("data/stats/skills", _skillFiles);
	}

	private void hashFiles(String dirname, List<File> hash) {
		File dir = new File(Config.DATAPACK_ROOT, dirname);
		if (!dir.exists()) {
			_log.config("Dir " + dir.getAbsolutePath() + " not exists");
			return;
		}
		File[] files = dir.listFiles();
		for (File f : files)
			if (f.getName().endsWith(".xml"))
				if (!f.getName().startsWith("custom"))
					hash.add(f);
		File customfile = new File(Config.DATAPACK_ROOT, dirname
				+ "/custom.xml");
		if (customfile.exists())
			hash.add(customfile);
	}

	public List<L2Skill> loadSkills(File file) {
		if (file == null) {
			_log.config("Skill file not found.");
			return null;
		}
		DocumentSkill doc = new DocumentSkill(file);
		doc.parse();
		return doc.getSkills();
	}

	public void loadAllSkills(Map<Integer, L2Skill> allSkills) {
		int count = 0;
		for (File file : _skillFiles) {
			List<L2Skill> s = loadSkills(file);
			if (s == null)
				continue;
			for (L2Skill skill : s) {
				allSkills.put(SkillTable.getSkillHashCode(skill), skill);
				count++;
			}
		}
		_log.config("SkillsEngine: Loaded " + count
				+ " Skill templates from XML files.");
	}

	public List<L2Armor> loadArmors(Map<Integer, Item> armorData) {
		List<L2Armor> list = new FastList<L2Armor>();
		for (L2Item item : loadData(armorData, _armorFiles))
			list.add((L2Armor) item);
		return list;
	}

	public List<L2Weapon> loadWeapons(Map<Integer, Item> weaponData) {
		List<L2Weapon> list = new FastList<L2Weapon>();
		for (L2Item item : loadData(weaponData, _weaponFiles))
			list.add((L2Weapon) item);
		return list;
	}

	public List<L2EtcItem> loadItems(Map<Integer, Item> itemData) {
		List<L2EtcItem> list = new FastList<L2EtcItem>();
		for (L2Item item : loadData(itemData, _etcitemFiles))
			list.add((L2EtcItem) item);
		if (list.size() == 0)
			for (Item item : itemData.values())
				list.add(new L2EtcItem((L2EtcItemType) item.type, item.set));
		return list;
	}

	public List<L2Item> loadData(Map<Integer, Item> itemData, List<File> files) {
		List<L2Item> list = new FastList<L2Item>();
		for (File f : files) {
			DocumentItem document = new DocumentItem(itemData, f);
			document.parse();
			list.addAll(document.getItemList());
		}
		return list;
	}
}
